Home / 28,123.65-42,197.12-12,320.51

Finding the Fourth Proportional to 28,123.65, 42,197.12 and 12,320.51

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Solution

The fourth proportional to 28,123.65, 42,197.12 and 12,320.51 is: 18,485.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,123.65 : 42,197.12 = 12,320.51 : x
  2. Step 2: Convert to fraction form
    28,123.65/42,197.12 = 12,320.51/x
  3. Step 3: Cross multiply
    28,123.65x = 42,197.12 × 12,320.51
  4. Step 4: Simplify right side
    28,123.65x = 519,890,082.82
  5. Step 5: Solve for x
    x = 519,890,082.82/28,123.65
  6. Step 6: Final answer
    x = 18,485.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.